Boiler



@-311 22, 1931. w. Rf STOCKWELL 1,337,593

BOILER Filed Aug. 13, 1923, 2 sheets-sheet 1 1514 340' ffy Dec. 22,1931. w. R. sTocKwELl. 1,837,593

BOILER Filed Aug. 18, 1928 2 'sheets-sheet 2 Patented Dec. 22, 1931UNEIED STATES sTccKwnLn, or' MICHIGAN CITY, INDIANA, AssIGNon.TofWEIn-MCLAIN rANY, or MICHIGAN CITY, INDIANAA Conroe-ANON or DELAWAREj ,j Y

Application.iea'lAugust 1s, V192e.Y Yserial N5. 300,530.`

This invention relates to improvements in boilers. I l A i In boilerconstruction, and especially in connection with those of the rectangulartype composed of a plurality of water sections, Ait isfound highlydesirable'to fen'case the boiler `proper in metal sheathing to'hideunsightly portions such as the joints between the sections, and give theexterior'of theboiler a 16 symmetrical,rectangular shape, thereby addiing greatly to the appearance ofthe same.

The enc'asing sheathing is further employed to protect vand cover theinsulation commonly applied to the exterior of the boiler, in additionto holding the insulation in place. The

artistic appearance of the boiler may alsobe further 'improved byfinishing the metal sheathing in various colors. I

A 'difiiculty encountered in encasing boil- .291 ers, and especiallythose of the sectional type,

is to properly lit the casing to the boiler, because boilers of thevsame! capacity vary in over-all size when nished, due to' the sec-Vtions not being uniformly fitted together. This is especially true ofboilers wherein the sections thereof are placed one in back of the otherand areconnected by nipples, it being evident that boilers of the samecapacity which have the sections tightly fitted .30 together', areshorter from front to back thanY those which have the sections thereofmore' loosely fitted together. Y 1

`One object of the invention is to provide encasing sheathing forboilers of the character indicated, which is constructedto compensatefor variations in sizes of boilers-ofV the same capacity, therebyaccommodating the casing to all such boilers without modifi-v Vgular ashpit member.l vA ported on the base l10,immediately above `the sion andcontraction ofthe boilersthereby avoiding damage to the sheathingandjoints thereof, ordinarily` due t'o stretching rof the walls of thecasing. "l

` Another object of the invention lis topro-` vide an vencasingstructure of'simple design,

which may be readily and economicallylapplied to the'boiler. Y t Y Y g ll 'Yet another obj ectfof vthe l invention is 'to provide van encasingsheathing structure for boilers wherein certain of theiittings of theboiler are employedto secure the sheathing in place', thusavoidingtheuse of additional securing'means and greatlyreducing the costof encasing the'boiler byeconomizing both inv labor land material.

j Other objects of the invention will more clearly appear lfrom thedescription4 and f claims hereinafter following.

i 'Inthe drawings forming a part .of this specification, Figure 1 is atop planyiew fof a'square sectional type of boilerhaving my jimprovements embodied therein. Figure 2 is l a front elevational viewofthe-'boiler illustrated iii-Figure 1. Figureuis a reareleva' tionalview thereof. *Figure 4 isa vertical longitudinal sectional viewcorresponding.y Y substantially to the `line 1Q-4' of 'Figure 2.,

Figure 5 is a horizontal sectional view corresp onding substantially tothe line 5-5 of F 1g` 'itA ure 2. And Figure-'6 isla vertical transversesectional view corresponding substantially to the line 6 6 of Figure 1.is shown of that type comprising a. pluralitj7 of tube sections A-A,clearly shown in Figures4 and 5. The sections are of the vertical typeand are disposedY transversely of the boiler and placed-one' behind theother from front to rear thereof. The sections A are supported on a base10 which comprises the usual front, rearA and side walls defining arectan# ashV pit section. The ash pit door is indi'-` cated by 12 and ishinged tothe front wallof the base 10. The clinker door 13 is disposedimmediately above the-ash pit door in an'upward extension 14 provided onthe base-10. f' Y The boiler is provided with a governor 15 grate'll issupv In said drawings, a construction of boiler Y les located at theytopthereof and having the usual lever mechanism 16 for controlling theoperation of the check draft and draft door of the boiler, chains 17 and18 being secured to opposite Aends Vof the lever for thispurpose. Thechainf17 has the lower end thereof con` nected with' a pivoted door 19mounted onkthe` right-handV side wall of the boiler, as shown in Figure2, the door 19 regulating the admission .ofair Yto the-ash pit of theboiler so as t0 control the draft.y The chain 18 is connected to a checkdraft 2O which is mountedv on the hood member 21 secured to the'rearwall of anl altitude gauge the boiler Vand communicating with the usualflue pipe 22 leading to the chimney. The

-In addition tothe governorA 15, the top of the boilerfhas'a reliefvalve, athermometer and tude auge being designated by^27 and the pipeittings leading Vto the thermometer and the relief valve beingrespectively designated :The boiler proper isenclosed within .the ensheathing casing composed of a plurality of plates or sheets whichareheld to the boiler A' without the use of additional'securing means,

the-same being clamped to the front and rear walls 'of'the-boilerby theusual fittings emploved. I

' :The en'sheathing 'casing which encloses the boiler iscomposedofafront wall 30, aback wall `31, `side walls: 32 and 33y and atop i' .Wall34.z AThe front'wallr3r() comprises a sin# gle sheetor platememberf which .is cut away centrally at the bottom :to correspond withthe' upward -extension14jof the front wall of the basecasting 10, theopening provided inthe sheet being Yof smaller size than the extension14 so that the edge of the plate about'v said opening will be overlappedby the.. side and top edge portions of. the ,extension14; As mostclearly shownin Figure 4, the bottom edgeof the plate 30.is,seated Yonthe top portion .of the front wallof ythe base casting 10 and isroverlapped by the up-. per edge thereof, as indicated, by the dotted llines in Figure 2 and as shownfin tliesection- .y ofthe plate 30 isprovided with an inturned alview of Figure V4. The top edge portionflange v35 connected .to vthe body portion, of the plate byfa horizontalsection36; The side edges .of the plate 30 are provided with similar.flanges 35V and connecting portions 36.

The plate 3()v is provided with openings 37, 38,. 39e-39,'to accommodatecertain of the boiler'fittings.. The Aopening 37 is employed mountedthereon, the altito accommodate the flue cleanout .door frame casting 40which is secured to the front of the boiler and has the usual rfluecleanoutdoors hinged thereto. The opening 37 is of slightf y ly small-ersize than the door frame structure 40 so thatthe flanged edgeportion ofkthe casting40 will overlap the'plate 30 at said opening to `clamp theplate against the front wall of the boiler and hold the same in place.The door frame casting 4()y is secured to the front wall of the boilerinthe usual manner, either rivets, boltsfor other securing meansV nbeingemployed.

The opening 38is,provided to accommodate the door frame casting 42 whichcarries the hinged fuel feed door ofgtlie boiler. The casting 42 isaffixed to the front wall ofthel boiler in the usual manner, byrivetsror other means, and Vtheopening 38 is of smaller size thanthe-frame 42 so `that the frame edge willr overlapl the plate 30Vatsaidopening, thereby furtherjclamping the plate tothe frontwall oftheboiler. rTheopefnings39 are three in number andv are provided topermit access to plugs 43- 43 ,which-are, employed to closecertainopenings inv the front wall of the boiler. The openings 39 areofslightly larger size than the plugs 43 soy-.that the latter may bereadily applied and removed'.

`Both of the side walls 32 and 33 are in the yform of plate members,each preferably com-k prising aV single plate. rBoth of these wallsV areof similar design, veachrbeing provided Vwith vertically. extendingrightvangular i liaiiges.44-,44 lat the front and rear edges thereof. ,Thebottom` edge of each yplate A32 and 33 rests on the base casting.10, asmost beingfprovided with a groove in which the bottom edge of said sidewall lis seated. The top edge of each sidewall v32 and 33 is lpro` videdwith a rightangular inturned flange Y 45 forapurpose hereinafter.pointed out. As

most clearly illustratedv in Figure 5, the

flanges 44 at the front edges of the platesw32Y and 33 engage within thegrooves formed between the vertical flanges'-Y 35 ofthe plate clearlyshown in'Figure 6,7the base'oasting I'Ii) V30 'andthe body portionproper of rthe-plate.

Asl will be evidentthe side plates 32 are thus 115 heldin assembledrelation with the front Y plate 30 bythe interengaging flange sections 1thereof. The side plate 32 is provided with proper openingsV vtoaccommodateV the pipe connections `for the valvegmembers of the watergauge 25 and the plate 33 is provided with similar openings toaccommodate the pipe connections of the vblow-off cocks Y26 vat theother sideof the boiler. The openings in the .plates extend through theedges thereofY so that rthe plates may be placed in position byslipping'the same over the pipe Vfittings without detaching the latter.v

The backwall31 of; the casing is composed ofy a pair of plate or sheetmembers which are vertically arranged side by'side, as ,most

clearly illustrated'inAFigures 3'and 5.y The wardly,

joint "betweenthe two plate members of the wall 31 isV formed byproviding one of the plates with an offset edge section 46Aoverlappingthe adjacent-edge of the other plate, therebyforming inl effect alapseam. The opposite vertical side edges and the top edge of the plates`forming the back wallf31 are provided with inturned llanges 47,-47connected to the wall proper by sections 4848,

the flanges 47 and connecting sections 48 being similar to theflan'es 35'andconnecting sections 36of` the front plate .30', hereinbefore saidopening, thereby clamping the same to the back of the boiler. j It -willbe understood that the hood casting 31 is secured to the'boiler in theusual manner by rivets, bolts or` other securing means. Adjacent thebottom edge, the back wall 31 is providedwith a pair of openings 50--50,which accommodate` the two return pipes 24Iof the heating sys-f tem, theopenings being inthe formof slots so that the plates forming the backwall may be slipped over the return pipes. The

back wall of the boiler is also provided with the usual openings for thehot water heatingV coil pipes, the openings 'in the back wall beingclosed by cover plates 51--51 secured in the usualmanner. The platesforming the back wall section of the casing are provided with a pair ofopenings 52-452 registering with the coil pipe openings 50 but ofsmaller size than the cover plates for said openings, whereby the coverplates overlap the Wall 31 adjacent said openings to further clamp thesame to the boiler. The back wall of the boiler is usually also providedwith an opening which is closed by a plug 53. The wall' member 31 isprovided with an opening registering with the plug 53 and of such a sizeas to freely permit application and removal of said plug'.

The top wall 34 is composed of two platek members joined by a lap seam54 which is in all respects similar to the lap seam 46 employed inconnection with the back wall 31. The front and rear-edges of the wallsection 34 are provided with upstanding flanges 55-55 which engagebetween the flange 35 and the main body portion of the vfront wall 30and the flange 47 and the main body portion of the back wall 31 of thecasing. The top wall section 34 is thus secured to the front and backwalls of the casing. The side edges of the wall section 34 are turneddownas indicated by 56 in Figure 6, the' downturned'sectionsbeing-overlapped by the top portions of the Vside walls 32 and 33 andthe inturnedl flange sections; V45of the side walls engageoverthehorizontal edge sections` of the top wall 34. The top wall isalso proV` vided with suitable openings `57,-"57 and 58-58, theopenings57 being two in'jnumber and accommodating the outletpipes'23--of theboiler."V The openings'Sarevfourinnuinber and,v'asshowrn accommodate thefrpipe fittings for the thermometer, altitudegauge,

relief valve and governor orregulator'of the I boiler. j Theopenings573a`nd`58 open through the edges of Ythe'plates'forming the top ywall34, asclearly shown in Figure 1, soasto"fa'`A cilitate the assemblingofthe parts. j y.As will 551.gif.'

be evident', the top wall-'34" of the` encasing structure isheld againstdisplacement by the interengaging flanges of said' wall-and' thefrontand'rear wallsvand is further held' againstV lateral displacementby thefabutting eef:

sections of th'efside' walls. They side 'vvalls,.

in turn, aire held against displacementbylthe.

flanges thereof which engage the flanges of the front and rear `wallsand "the over"-` hanging top flanges of the side-walls 'serve to holdvthe top wallfagainst upward"displae-` ment. y As hereinbefofre.pointed'v out`,the front 'and .rear` Wall members"` 3,0a1'1dE 1j'a r 'e`securely clamped to thecorresponding walls ofthe boiler by. the doorframesi40. andi l l at 'the'front ofthe boiler. andthe lOOdICfSit ying21and cover plates 51associated14 with the back wall ofthe boiler.ltwillithusfbe evident'that the entire casing structurels heldtogetherwithout the employment of any securing meansfsuch as-rivets 'orbolts, and th atthe `,entire casing is held to. theV boiler directlybythe Vfittings usually ,e'nnployedA in connection with. thel boiler,without theAv use of 'any additional securing elements. The

ibs

cost of material is thusgreatly 'reducedv and, Y

further, the labor necessaryfin assembling y the parts'isv a greatdealless' than 'when the plates forming the `casing are secured togetherby seaming or'othersecuring opera? tional*l f 'f l In 'applying thecasingto the boiler,` the front plate 30 `is preferablylfirst`placedinposition and the flangededge-section of the top wall '34' engaged-withthe vflange 4of theV plate 30. The side plates and33 arenext applied andthe flanges thereof engaged with theflange ofthe plate 30 slightlytilting:

the plates 32`and 33. ,Afterthe llanges' have been engaged, the sideplates areforced into position against the sides of theboiler there',-A

by engaging the overhanging top flanges over Y the top wall 34. The backwall""31,fcom` posed of the two plates, is next applied,"the

plates beingapplied separately. :so: as torenl,

Vgage the flanges thereof over the f flanges of the top wall' 34andside'vvalls 32 and33'. u After vthe flanges have been interengaged,

een

'l the plates-,forming the backzwall areY forced together edgewise, tooverlap the oii'set edge 46 with the adjacent edge of the other plate.

The hood 21 andthe cover plate 51 are then secured in position, therebyclamping the back wallin place. The door :trames 40 and i2 are also*securedin position toclarnp the Y front wall 31 to 4theboiler.` As willbe evident, Vwhen the, parts of the encasing structure have been thusassembled, the-,same will neatly lit the boilerand due to the playbetweenthe engaging iianges of the plates,

boilers independently of boilersl of the .same capacity, ofthe'sectional type y,whereinlthe sections arecplaced one in back of theother,[is ,unavoidable because inclampingor forcing the sectionstogether,

some of the sections will be fitted together moreV .tightly thanothers,Y therebyv varying c thefspacing between the sections; further,

often all of the sections of one boiler are fitted together more looselythan the sections of another boiler v of 'theA same capacity,

- thereby lincreasing theover-all length, from Afront to rear,`rof thefirst named boiler over that `offthelatter. i v

i 1,837,5ea

rear edges abutting the front*` and rear plates to confine lthe sametherebetween, the two pieces of said top `plate having overlapping edgeportions, said pieces of the topf-plate having the outer sideedgesthereof downturned, said .downturned edges, engaging said side plates,whereby the top plate is held thereby against lateral' shift, said frontand rear plates being clamped to the .front and rear ends of theboiler,respectively.

" In witnessl that -Ilclaimr the vforegoing I have hereunto subscribedmyfname this 8thY WILLIAM n.7 sToCKwELL. Y

Asjwin b'evident, in addition to compta` f s'atingfor'variations insizeslof boilers, rny

` improved encasing structure will also accorn- Y tfnodate itselfvr tothe expansion vand contraction of boilersdue'tofchanges in te1npera.VV

ture, therebyavoiding damage to the joints between the sheets due tostretching of the casing.` p u Althoughin the present instance, the en-Vsheathing casing` is'y shown as directly cover- 4ing'the boilervproper,it will be appreciated that it is'within the invention to provide theexterior of the boilerwith insulating mate rial andap'ply theensheathing casingso as to'ernbrace the ,insulating material to holdyvthe Vsame in j position 'and also protect it against damage.

now consider the preferred manner of carrying outl my invention, but thesaine is merely illustrative and I Vcontemplate all changes andmodifications that come withiny i L,the scope of thecclairri' appendedhereto. y

Iclairn: Y ,Y A Y In combination, a broiler of substantially Irectangularshape;y and a Vcasing Aenclosing said. boiler, said casingincluding a one piece front plate, a rear plate, a pair of one piecesidel plates, and a twopiece top plate, said vfront and rear plateshaving inturned'vertical edge portions at opposite sides thereofoverlying lsaid side: plates andconfining the same, said front. and'vrear plates having'.A in

turnedtopiianges overlying the'front, and

las

rear :edges of the top lplate to conine ysaid plate, said top platehaving the Lfront and Y I have herein shown andv described what I Y

